Material working and mixing machine



April 14, 1925.

W. N. HARTSHORN MATERIAL WORKING AND MIXING MACHINE Filed OCL. 22, 1923 2 SheS'cS-Shet 1 April 14, 1925,

W. N. HARTSHORN MATERIAL WORKING AND MIXING MACHINE Filed bot. 22, 1925 2 Sheets-Sheet 2 SAZ Patented Apr. 14, 1925.

' UNITED STATES PATENT OFFI ,WILLIS N. HAIulrsHotaN, or RACINE, WISCONSIN, AssIGNoR `To RACINE CONFEC TIoNERs `MACHINERY Co., or RACINE, WISCONSIN, A CORPORATION pplricationled 'October 22, 1923.

to all 'whom it may concern:

:Be it known that I, WILLIS N. IIAR'rsHoRNJ a citizenof the United States, and resident of Racine, in 'thecounty of Racine and State of Visconsin, haveinvented new and useful Improvements in Material Working and Mixing Machines, of which the following is a description, reference being Vhad to the accompanying drawings, which are apa-rt of this specification.

` This invention relatesto certain new and useful improvements material working and mixing machines capable of usel in connection with the reducing, drying, mixing and working of chocolates,- pastries and other. vconfectionery materials.

Itis highly; desirable that the material receiving pan or container of machines of the character described be heated kor cooled and to this end the `containers have been jacketed to provide a `chamber in which a temperature controlling medium flows, the chamber having an inlet and an outlet posi'- tioned at opposite `sides thereof. This Vmanner of 4regulating the container temperature has proven objectionable in that the medium flows substantially directly from the inlet to the outlet .resulting in uneven heating or coolingof the container walls.

Several attempts have been made in the art .to lovercome Ath-is unequal temperature in 'the container wall and the patent to Shepherd No. 845,438, granted February 26, 1917 endeavors to provide means for maintaining a uniform temperature throughout the entire area offthe bottom of the container.

Having the above and other objections in mind, vthis `invetionhas for a primary object to provide means for maintaining the tem- 0` perature of the container or pan -Walls `substantially uniform.

It is another object of this invention to provide .means for evenly distributing a cooling jor heating .medium in the jacket or chamber contacting with the pan or container walls. Y

Afurther .object of this :invention resides in theprovision of .means `for evenly withdrawing the cooling or heating medium from Ithe jacket spacefsurroundin'g the container or receptacle to thus prevent the cool ing lor heating .medium from flowing in a direct 'narrow path frominlet to outlet and or WIs- MATERIAL WORKING AND MIXING MACHINE.

Serial No. 670,127.

consequently eliminating the formation fof cold or hot spots in the container walls.

And a still further object of this invention resides in the provision ofalspill-way at the upper peripheral edge `of the .jacket sur-v rounding the container whereby the cooling or heating medium is evenly withdrawn from the jacket `chamber at all points.

llVith the above and other `objects in view which will appear asthe description proceeds, my l-invention resides in the Anovel confstruction, combination and arrangement of parts substantially as hereinafter 'described and more particularly defined b the appended claims, it being understoo thatsuch changes in the precise embodiment of the hereindisclosed invention may 'be made as come within the scopeof the claims.

In the accompanying drawings, I have illustrated one complete example of the `physical embodiment of my invention constructed according to the best mode I have so far devised for the practical `application of the principles thereof, and in which:

Figure 1 is a view, partly in section and partly in side elevation, illustrating ra ma terial working machine embodying this invention, and

Figure 2 is a top plan View thereof, `.parts being broken away and in section to illustrate structural details.

Referring now more particularly to the accompanying drawings, in which like numerals designate like parts throughoutthe several views, the numeral 5 designates a pan orcontainer suitably supported .by Vlegs 6 and having a central, cylindrical projection 7 extended thereinto, as best shown in Figure 1.

The central projection 7 vcarries a vertical bearing member 8 in which 'the upper end of a vertical shaft 9 is journaled, the lower end of said shaft beingjournaled ina bear; ing mounted in the lower end of a housing 10 centrally suspended from the lbottom of the machine. Shaft 9 is driven from a power shaft 11 which is connected `with a suitable motor or other source of power and is journaled in bearings 12 carriedby hangers 13. The inner end of shaft l1 has a drive pinion 14 secured thereto which meshes with a relatively large beveled igear A spider member 16 having radial arms 17, 18 and 19 is xed to the upper end of shaft 9 and mounts material working blade erence may be had theretofor a detailed description of its operation.I

- ,The pan or container 5 has its outer p'e-v ripheral edge anged or directed laterally, as at 26, to engage the upperfouter edge of a jacket 27 in which the pan is nested with its side and bottom walls spaced v'from the side andbottom walls of the jacket Ito provide a chamber or space 28 therebetween. The pan 5 is detachably secured in the jacket 27 by suitable machine screws or other means 29 which pass through openings in the flange 26 and are threaded in the lugs or ears 30 formed in the peripheral edge of the jacket.

i l The jacket 27 is provided withla central opening to accommodate shaft 9, and surrounding thecentral opening is an upstanding annular' flange 31 which extends tosubstantially the top of the central projection f 7of-thepan. lThe housing 10 is secured to the jacket 27 in' register with the central opening therein by members 32,.

Mounted within that portion of space 28 lbetween the bottom walls of the pan 5 and jacket 27 is a coil 33, one end 34 thereof being closed and the other end thereof connectable with a source of cooling or heating fluid, not shown,vthrough a valve 36. Coil 33 is of the shape illustrated in Figure 2 having two substantially concentric coils connected by a return bend 37. The coil 33 is provided with a plurality of outlet ports or openings 38' arranged to discharge in opposite directions so that the cooling or heating medium is substantially uniformly distributedthroughout the chamber 28.

An annular trough or spill-way 39 is provided along the peripheral edge of the jacket side wall, which communicates .with compartment 28 at its vhighest point over the spill-way or trough edge 40. The spill-way or trough 39 is unbroken except for the width of the discharge door 41,leading from the interior ofthe pan 5, and an over-flow or discharge pipe 42 leads therefrom to the sewer or other place of discharge, not shown.

VIn operation, the heating or cooling medium, suchas water or the like, enters the chamber or space 28 at numerous points through the ports or openings 38 and is levenly drawn kfrom the container over the edge thus preventing a flow of the medium in a direct path from the inlet to the outlet. If desired edge 40 maybe provided with a plurality of-notches 43 through which the cooling or heating medium flows into the trough and thence outwardly through, the ff discharge 42. A drain 44 having a valve 45 therein leads from the bottom of the space 28 to the discharge pipe 42 to facilitate drainingkthe same.

ln the event itis `desired to heat the pan wall by steam in lieu of hot or warm water,

a steam coil 46 is provided of 'a shape simi` desired temperature by the medium supplied coil 46 which by reason of its `shape maintains the water at a uniform temperature throughout substantially lthe entire area of space 28.

From the foregoing description taken in connection with the accompanying drawings it will be readily apparent to those skilled in the art to which an invention of this character appertains that I provide means for heating and coolingthe material receiving pan or container, which prevents the formation ofpaths of cooling or heating medium across the pan bottom and the consequent uneven cooling or heating thereof, and which insures the maintenance of the material receiving pan or containerwalls at a substantially uniform temperature.

What I claim as my invention is:

1. In a machine of the character described including a jacket member, a container nested in the jacket member, the side and bottom walls of the jacket member and i container being spaced to provide a temperature regulating chamber and means for introducing a temperature controlling fluid in said chamber, an annular trough surrounding the upper portion of the jacket member, an annular spill-way passage communicating the temperature regulating chamber with said trough and a fluid outlet communicating with said trough `whereby the temperature controlling fluid is substantially evenly withdrawn from the chamber by over-flowing into the troughthrough said spill-way passage.

2. ln a machine of the character described including a jacket'member and a container nested in the jacket member, the. side and bottom walls of the jacket member and container being spaced to provide -a temperature regulating chamber, `a temperature regulating medium supply member disposed in the-lower'portion of said chamber and including substantially concentric coils connected by a return bend, an annular trough vsurrounding the upper portion of the jacket fluid outlet communicating with said trough whereby the temperature controlling fluid is substantially evenly withdrawn from the chamber by over-flowing into the trough through said spill-way passage.

3. In a machine of the character described including a jacket member and a container nested in the jacket member, the side and bottom walls of the jacket member and container being spaced to provide a temperature regulating chamber, a cooling medium supply member disposed in the lower portion of said chamber and including substantially concentric coil portions connected 20 by a return bend, a heating medium supply including substantially concentric coil portions connected by a return bend, said supply members being intermingled, means for independently connecting said supply mem- L.

bers with their respective sources of supply, an annular trough surrounding the upper portion of the jacket member, an annular spill-way passage communicating the temperature regulating chamber with the annula-r trough, and a fluid outlet communicating with said trough whereby the temperature controlling fluid is substantially evenly withdrawn from the chamber by over-flowing into the trough through said spill-Way passage.

In testimony whereof I aiiix my signature.

WILLIS N. HARTSHORN. 

